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I have been so busy that I really haven't had time to check my on times with my ac. Well this morning it ran for 1 minute on like 50 off 2 minutes on and 30 off and 4 on with 30 off and 5 on with 30 off. Is there any way you guys think something is wrong with the stat? I don't see how the stat could get a 1 degree difference in 1 minute or even 2 minutes.

It's possible too "cool" down quickly if the supply register is near the Tstat and perhaps you have a near zero heating load which may include the morning sun or a hot attic even though the outside temp is lower than the setpoint.

beenthere, what is telling that unit to come on if the tstat is not sending the signal? I am not familiar with this. It there an internal tstat in the outside unit telling it to run. Please clarify.

Its 72 outside and 79 inside, with the stat set to 78. It should come on if he has heat from solar gain, and or heat from internal appliances.

I have enough heat generating appliances inmy house that my A/C runs when its 68 outside with my stat set to 72.
I have 1650 sq ft, a 2.5 ton A/C, and I can maintain 72 when its 98 outside. My A/C is oversized.
But I tricked it out.

In the fall, it takes several days of 50* weather before I need to run the heat.

You have to keep in mind, that people from all around the World post here.
Many different houses, systems, and needs.

ok beenthere, I am with you. I misunderstood. I thought in my mind he was saying it was 72 in the house and tstat at 78, my mistake. So my question should have been what is the tstat set to and what is the temp in the house. Do you have a digital stat, sounds like not? oversized could be the prob, bu that is also a guess. I wanted to see if you could adjust that tstat a few degrees and see how long it runs to reach the new temp. Just curious if it is responded correctly to tstat changes.

I have been so busy that I really haven't had time to check my on times with my ac. Well this morning it ran for 1 minute on like 50 off 2 minutes on and 30 off and 4 on with 30 off and 5 on with 30 off. Is there any way you guys think something is wrong with the stat? I don't see how the stat could get a 1 degree difference in 1 minute or even 2 minutes.

What part of the U.S. do you live in? Whats your %RH? Do you use t-stat set-up when the home is not occupied? Is there a basement involved in air circulation pattern? Cool basements may affect the length of time a/c operates because of cool concrete. You may try monitoring the t-stat area with a independent Temp/%RH meter to confirm correct t-stat function. Sounds like cold air is being supplied near the t-stat. Regards TB

I have been so busy that I really haven't had time to check my on times with my ac. Well this morning it ran for 1 minute on like 50 off 2 minutes on and 30 off and 4 on with 30 off and 5 on with 30 off. Is there any way you guys think something is wrong with the stat? I don't see how the stat could get a 1 degree difference in 1 minute or even 2 minutes.

Ok i'm back I had to go do some work. To answer some questions I live in Little Rock Arkansas. I have a family 400 American Standard stat with a allegiance AS 14 outside unit with comfort R 4 ton. The ac is single stage. Comfort R is seleced. The CFM is 350 I believe. They have it set to the lowest blower setting. My house is 1 story 2500 sq ft on a slab facing south. The RH in the house this morning was 52% and outside was 78%. The house stays very dehumidified. Do I have any other solutions other then to try and get a smaller unit??